A physician reported that the certas valve was implanted to a (b)(6)-old girl via v-p shunt on (b)(6) 2020 with unknown settings.After placing the valve, the hydrocephalus symptoms recovered.In the middle of (b)(6), csf retention under the skin around the valve and swelling were observed.Although the patient's condition was stable, on (b)(6) 2020, the valve (with a setting of 5) was replaced with a new one.No further information was provided by hospital.
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Unique device identifier (udi) : (b)(4).The valve was returned for evaluation: failure analysis - the valve was visually inspected, needle holes in the needle chamber were noted.The valve was leak tested, only leaked from the needle holes in the needle chamber.The valve passed the test for programming, flushed, occlusion, reflux, siphon guard and pressure.No root cause could be determined as the technician could not confirm any problem with the valve at the time of investigation.The possible root cause for "csf retention under skin around the valve and swelling were observed" could be due to surgical technique / user handling (as specified in ifu - surgical procedure precautions - verify proper placement and integrity of ligatures at all tubing junctions to prevent tears or abrasion of the silicone tubing).At the time of investigation no issues were noted with the valve.
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